Data Visualization
PAF — October 8, 2019
Today’s discussion
- Dos and Don’ts
- Know your Data
- DataViz Election
Font Size
What do you use color for?
RColorBrewer
When can we justify changing the y axis?
Don’t tell, show
Once upon a time, there was a little girl who lived in a village near the forest. Whenever she went out, the little girl wore a red riding cloak, so everyone in the village called her Little Red Riding Hood. One morning, Little Red Riding Hood asked her mother if she could go to visit her grandmother as it had been awhile since they’d seen each other. “That’s a good idea,” her mother said. So they packed a nice basket for Little Red Riding Hood to take to her grandmother. When the basket was ready, the little girl put on her red cloak and kissed her mother goodbye. “Remember, go straight to Grandma’s house,” her mother cautioned. “Don’t dawdle along the way and please don’t talk to strangers! The woods are dangerous.” “Don’t worry, mommy,” said Little Red Riding Hood, “I’ll be careful.” But when Little Red Riding Hood noticed some lovely flowers in the woods, she forgot her promise to her mother. She picked a few, watched the butterflies flit about for awhile, listened to the frogs croaking and then picked a few more.
Don’t tell, show
source: serialmentor.com/dataviz
You should go 3D when it’s physically meaningful
Pies are great
Pies are great
Treemap
Who are you talking to?
Amazon’s Last Price: 1725.45
17:55:00 2019-10-08
17:55:00 2019-10-08
Data-types
Data come in all flavours
- Numeric (Age, $, height, Life-Exp)
- Categorical (Young/Old, Republican/Democrat)
- Network (Environment, People Interaction)
- Spatial (Maps, Geographical)
One variable – Distribution
Two variables – relationship
Choose your own adventure
Examples & DataViz Election
Warning: Following content is highly subjective!
Advice
- Pay attention to the order of bar plots.
- Use direct labeling & get rid of legends.
- Use color responsably. Mind diversity in color perception and monochrome prints.
References
R Packages
ggplot2, sf, cowplot, ggridges, ggforce, ggrepel, colorblindr
Graph Gallery
Books
